The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1987
Filed:
Aug. 27, 1985
Applicant:
Inventor:
Takao Inaba, Aichi, JP;
Assignee:
Pilot Ink Co., Ltd., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
B43K / ; B43K / ; B43K / ;
U.S. Cl.
CPC ...
401199 ; 401209 ; 401217 ;
Abstract
A writing pen having good ink flow control to a tip suitable for fine writing over a wide range of atmospheric pressure and ambient temperature. The pen has a flow-regulator composed of first, second and third ink supply rods connected in series. The flow-regulator has a plurality of fins around its circumference which cooperatively define a labyrinth groove. The spacing between fins varies from the front end to the rear end of the flow-regulator, with the widest spacing occurring at the front end, towards the writing tip of the pen.